/* * Device tree support * * Copyright (C) 2013, 2015 Altera Corporation * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> * * Based on MIPS support for CONFIG_OF device tree support * * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * */ #include <linux/init.h> #include <linux/types.h> #include <linux/memblock.h> #include <linux/of.h> #include <linux/of_fdt.h> #include <linux/io.h> #include <asm/sections.h> void __init early_init_devtree(void *params) { __be32 *dtb = (u32 *)__dtb_start; #if defined(CONFIG_NIOS2_DTB_AT_PHYS_ADDR) if (be32_to_cpup((__be32 *)CONFIG_NIOS2_DTB_PHYS_ADDR) == OF_DT_HEADER) { params = (void *)CONFIG_NIOS2_DTB_PHYS_ADDR; early_init_dt_scan(params); return; } #endif if (be32_to_cpu((__be32) *dtb) == OF_DT_HEADER) params = (void *)__dtb_start; early_init_dt_scan(params); }